CVE-2026-77128 in Event management and registration Extension
Summary
by MITRE • 08/25/2026
The extension fails to enforce enable-field restrictions on a repository query parameter. An unauthenticated remote user can pass a demand-override parameter to view hidden or time-restricted events, unless the disableOverrideDemand plugin setting is active. Exploitation of this issue requires only that disableOverrideDemand is not enabled.
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Analysis
by VulDB Data Team • 08/25/2026
The identified vulnerability represents a critical access control failure within an extension designed for managing repository queries and event visibility. The core technical flaw lies in the improper enforcement of enable-field restrictions on specific query parameters, specifically those related to demand overrides. In secure software architecture, field-level security controls are intended to restrict user interactions with sensitive data fields based on their assigned privileges or role-based access policies. However, this implementation fails to validate whether an unauthenticated remote user possesses the necessary permissions before processing a demand-override parameter passed through the query interface. This oversight allows attackers to bypass standard visibility filters that would normally hide certain events from unauthorized viewers.
The operational impact of this vulnerability is significant as it enables information disclosure without requiring any form of authentication or prior login credentials. An attacker can exploit this flaw by crafting specific HTTP requests containing a demand-override parameter, which tricks the application into revealing hidden or time-restricted events that should remain inaccessible to general users. This capability effectively neutralizes security measures designed to protect sensitive temporal data or confidential event details from public view. The severity of the impact is directly tied to the sensitivity of the exposed information; if these hidden events contain proprietary business intelligence, personal identifiable information, or critical infrastructure status updates, the exposure could lead to substantial organizational damage and regulatory non-compliance.
The exploitation vector for this vulnerability is notably simple, requiring only that a specific configuration setting named disableOverrideDemand remains inactive. This indicates that the security mechanism relies heavily on a single boolean flag rather than implementing robust server-side validation logic independent of user input. If an administrator fails to explicitly enable the disableOverrideDemand plugin setting, the system defaults to allowing these override requests, thereby leaving the application vulnerable by default or due to configuration negligence. This highlights a common pattern in software security where complex access control rules are inadvertently simplified into toggle switches that can be easily misconfigured, leading to widespread exposure across all instances of the affected extension unless manually corrected.
From an industry standards perspective, this vulnerability aligns with CWE-284 Improper Access Control and CWE-601 URL Redirection to Untrusted Site or similar logic flaws where input is not properly validated against security policies. It also maps to MITRE ATT&CK techniques related to Discovery, specifically T1078 Valid Accounts if authentication were required, but in this unauthenticated context, it falls under general information gathering and unauthorized access patterns often seen in web application attacks such as those described in OWASP Top 10 categories for Broken Access Control. The failure to enforce field-level restrictions is a classic example of insufficient server-side validation where client-supplied parameters are trusted implicitly without rigorous permission checks.
To mitigate this vulnerability, immediate action must be taken by system administrators and developers to ensure that the disableOverrideDemand plugin setting is enabled in all production environments. This configuration change acts as an emergency patch by disabling the specific parameter pathway exploited by attackers. Beyond this temporary fix, a long-term remediation strategy should involve refactoring the underlying code to enforce enable-field restrictions at the application logic layer rather than relying solely on plugin settings. Implementing strict input validation and ensuring that all query parameters are verified against user permissions before processing will prevent similar bypasses in future updates. Regular security audits of configuration files and access control lists are also recommended to ensure that such critical toggles remain correctly configured as organizational policies evolve.